CIRRHIPEDA SECOND ORDER. 41 



" Acasta is found upon sponge. 



" For examples of Creiisia, we must examine 

 our madrepores, and other corals ; the shells of 

 this genus are either affixed or buried in them. 



" Pyrgoma likewise adheres, or penetrates 

 into corals. 



" In the ' Penny Cyclopaedia,' under the word 

 Cirrhipeda, you will find much useful informa- 

 tion, and some plates that will give you a good 

 idea of this class. In the British Museum you 

 may see many of the species, and may thus 

 make yourselves familiar with them. 



" 2nd Order. Shells pedunculated. 



Pe7italasmis, ( Anatifera . ) ^ 



Pollicipes. ( ^ 



^. V Lepas. 



Cineras. ' 



Otion, ear-barnacle. 



J 



" We have already noticed Pentalasmis, or 

 barnacle, (Plate 2.) The generic name is 

 changed by later writers ; so are those of the 

 two last. 



" Pollicipes resembles Pentalasmis, with a 

 shorter pedicle, which is rough. The natives of 

 Goree are said to eat a large species of Penta- 

 lasmis.'''' 



'' I think we shall not fail to recollect the 



